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-rw-r--r--Misc/NEWS3
-rw-r--r--Modules/_ssl.c3
2 files changed, 5 insertions, 1 deletions
diff --git a/Misc/NEWS b/Misc/NEWS
index 188a09d..7b3bebc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -90,6 +90,9 @@ Core and Builtins
Library
-------
+- Issue #13885: CVE-2011-3389: the _ssl module would always disable the CBC
+ IV attack countermeasure.
+
- Issue #6631: Disallow relative file paths in urllib urlopen methods.
- Issue #13781: Prevent gzip.GzipFile from using the dummy filename provided by
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index becf6a5..eaf67c4 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -369,7 +369,8 @@ newPySSLObject(PySocketSockObject *Sock, char *key_file, char *cert_file,
}
/* ssl compatibility */
- SSL_CTX_set_options(self->ctx, SSL_OP_ALL);
+ SSL_CTX_set_options(self->ctx,
+ SSL_OP_ALL & ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
verification_mode = SSL_VERIFY_NONE;
if (certreq == PY_SSL_CERT_OPTIONAL)